KU’s McCollum Hall came crashing down Wednesday after 50 years atop Daisy Hill.

About 750 pounds of explosives spaced throughout the building detonated around 9 a.m., reducing the 10-story, three-wing, 220,000-square-foot residence hall to a pile of rubble.

The 600-foot “evacuation perimeter” around the site will be enforced until 9:30 a.m. Barricades along Iowa and 19th streets are expected to be removed by 10 a.m.

Check back to LJWorld.com for more photos, videos and more coverage from campus.

While reports come in, catch up on Journal-World reporter Sara Shepherd’s story about pre-demolition prep. Other articles of note: What happened to the dorm’s furniture + where the namesakes’ portraits ended up + why fire crews kept coming back to 1800 Engel Road.

Also, take a look at KU’s plans for the newly open space on Daisy Hill.

Just wow! #KUmccollum comes down in 20 seconds pic.twitter.com/ysR1LqUs0p

— Tim Caboni (@caboni) November 25, 2015

Jefferey Jewsome, of Lawrence, plays taps for the crowd after the implosion. #mccollumhall Photo by @MFrizzell85 pic.twitter.com/v65XDvfRfJ

— Lawrence Journal-World (@LJWorld) November 25, 2015

Aftermath #mccollumhall #implosion pic.twitter.com/yPCVW5c3oQ

— Nikki Wentling (@nikkiwentling) November 25, 2015

And #McCollum Hall is no more. Big booms, building crumbled, this is view when smoke cleared. #KU pic.twitter.com/5WROeXsn7X

— Sara Shepherd (@saramarieshep) November 25, 2015

Skyline looks so different now. pic.twitter.com/s4FULSc3yT

— Caitlin Doornbos (@CaitlinDoornbos) November 25, 2015

Something's missing at 19th and Iowa. pic.twitter.com/55ti2o8BS3

— Caitlin Doornbos (@CaitlinDoornbos) November 25, 2015

Closer view of the wreckage. Still smells like concrete dust. #mccollumimplosion #ku pic.twitter.com/T0JYBf7p5m

— Sara Shepherd (@saramarieshep) November 25, 2015